[PATCH mm v4 16/39] kasan: define KASAN_VMALLOC_INVALID for SW_TAGS
From: <hidden>
Date: 2021-12-20 22:00:39
Also in:
linux-mm, lkml
Subsystem:
kasan, memory management, the rest · Maintainers:
Andrey Ryabinin, Andrew Morton, Linus Torvalds
From: Andrey Konovalov <redacted> In preparation for adding vmalloc support to SW_TAGS KASAN, provide a KASAN_VMALLOC_INVALID definition for it. HW_TAGS KASAN won't be using this value, as it falls back onto page_alloc for poisoning freed vmalloc() memory. Signed-off-by: Andrey Konovalov <redacted> --- mm/kasan/kasan.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h
index 952cd6f9ca46..020f3e57a03f 100644
--- a/mm/kasan/kasan.h
+++ b/mm/kasan/kasan.h@@ -71,18 +71,19 @@ static inline bool kasan_sync_fault_possible(void) #define KASAN_PAGE_REDZONE 0xFE /* redzone for kmalloc_large allocations */ #define KASAN_KMALLOC_REDZONE 0xFC /* redzone inside slub object */ #define KASAN_KMALLOC_FREE 0xFB /* object was freed (kmem_cache_free/kfree) */ +#define KASAN_VMALLOC_INVALID 0xF8 /* unallocated space in vmapped page */ #else #define KASAN_FREE_PAGE KASAN_TAG_INVALID #define KASAN_PAGE_REDZONE KASAN_TAG_INVALID #define KASAN_KMALLOC_REDZONE KASAN_TAG_INVALID #define KASAN_KMALLOC_FREE KASAN_TAG_INVALID +#define KASAN_VMALLOC_INVALID KASAN_TAG_INVALID /* only for SW_TAGS */ #endif #ifdef CONFIG_KASAN_GENERIC #define KASAN_KMALLOC_FREETRACK 0xFA /* object was freed and has free track set */ #define KASAN_GLOBAL_REDZONE 0xF9 /* redzone for global variable */ -#define KASAN_VMALLOC_INVALID 0xF8 /* unallocated space in vmapped page */ /* * Stack redzone shadow values
--
2.25.1
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